Gas-oil conversion burner tube



y 956 A. JOHNSON 2,744,568

GAS-OIL CONVERSION BURNER TUBE Filed April 21, 1952 2 Sheets-Sheet 1Ar/eigh 0. Johnson- INVENTOR.

BY MM 3% y 1956 A. Q. JOHNSON GAS-OIL CONVERSION BURNER TUBE 2Sheets-Sheet 2 Filed April 21, 1952 Ar/eigh 0. Johnson IN VEN TOR.

United States Patent GAS-OIL CONVERSION BURNER TUBE Arleigh Q. Johnson,Fulton, Mo.

Application April 21, 1952, Serial No. 283,357

1 Claim. (Cl. 158-11) The present invention relates to new and usefulimprovements in automatic gas and oil burners capable of burning eithergas or oil and including a single igniting means for both types of fuel.

An important object of the invention is to provide means for convertingany pressure atomizing oil burner into a burner that will burn eithergas or oil and whereby one type of fuel may be substituted for the otherwithout necessitating substitution of any of the parts of the burner.

Another object is to provide a burner tube adaptable to replace theusual blast tube of any pressure atomizing oil burner and with a minimumchange in furnace construction to convert it for burning either gas oroil.

A further object is to provide a device of this character of simple andpractical construction, which is efficient and reliable in operation,relatively inexpensive to manufacture and otherwise well adapted for thepurposes for which the same is intended.

Other objects and advantages reside in the details of construction andoperation as more fully hereinafter described and claimed, referencebeing had to the accompanying drawings forming part hereof, wherein likenumerals refer to like parts throughout, and in which:

Figure l is a side elevational view of the combined burner unit;

Figure 2 is a front elevational view;

Figure 3 is a vertical longitudinal sectional view taken on a line 3-3of Figure 2;

Figure 4 is a rear elevational view showing the delivery end of theburner tube; and

Figure 5 is a perspective view of the telescoping tube for feeding thegas-air mixture to the burner tube.

Referring now to the drawings in detail, wherein for the purpose ofillustration I have disclosed a preferred embodiment of my invention,the numeral 5 designates the unitary gas and oil burner generally andincludes a pedestal and base 6 supporting the motor housing 7 and fanhousing 8.

A cylindrical burner tube or casing 9 is formed at one end with anattaching flange 10 for attaching to the outlet side of fan housing 8 atthe inner or rear end of the burner, the tube 9 being constructed ofinner and outer sleeves 11 and 12 united with each other at the attachedend of the tube and spaced one within the other to form an annularpassageway 13 leading toward the open or delivery end of the tube. Apair of undulated or corrugated diffusing rings 14 are arrangedconcentrically in the open or delivery end of passageway 13 with aseparator ring 15 therebetween. The passageway 13 at the delivery end ofthe burner tube forms an annular gas burner.

The closed end of passageway 13 is formed with a throat 2,744,568Patented May 8, 1956 16 from which a' tube 17 projects into the bottomof fan housing 8 and in which the inner end of a gas-air mixture tube 18is telescopically received. The front end of tube 18 is flared andprojects outwardly at the front of the fan housing and is formed with abracket 19 and clamp 20 for supporting a nozzle 21 centrally at thefront of tube 18 and to which a gas supply pipe 22 is connected. Gaspipe 22 is provided with the usual automatic gas valve 23 and standardgas burner controls 24. The nozzle 21 is adjustable inwardly oroutwardly of tube 18 by clamps 20 and a primary air regulating plate 21ais adjustable on the nozzle to provide a primary air adjustment.

The oil line 25 leads through the fan housing 8 to a burner tip 25a atthe delivery end of the burner tube 9 and is supported centrally'in thedelivery or open end of tube or casing 9 by a bracket 26 and the usualelectrodes 27 are provided adjacent the burner tip for igniting thefuel.

A gas pilot 28 at the delivery end of a gas line 29 is also supportedadjacent the electrodes and forms part of the gas burner.

In the operation of the device, the burner unit is equipped toselectively burn either gas, by means of the supply pipe 22, gas-airmixing tube 18 and passageway 13 feeding the gas to the delivery end ofburnertube or casing 9, or to burn oil by means of oil supply pipe 25.Both fuels are ignited by the electrodes 27, the oil-air mixturedirectly at the burner tip 25 and the gas-air mixture indirectly throughthe gas pilot 28 which is ignited by the electrodes 27 and ignites thegas-air mixture at the delivery end of the tube or casing 9, and thesupply lines for both fuels are provided with the usual automatic burnercontrols.

Primary air for mixing with the gas enters the open front end of tube 18and secondary air for both the gas and oil fuel is supplied to burnertube or casing 9 by the fan, as shown by the arrows in Figure 3.

In view of the foregoing description taken in conjunction with theaccompanying drawings it is believed that a clear understanding of thedevice will be quite apparent to those skilled in this art. A moredetailed description is accordingly deemed unnecessary.

It is to be understood, however, that even though there is herein shownand described a preferred embodiment of the invention the same issusceptible to certain changes fully comprehended by the spirit of theinvention as herein described and the scope of the appended claims.

Having described the invention, what is claimed as new is:

In a burner including a fan housing having an outlet side and a burnertube having one end attached to said side and an opposite open fueldelivery end, a sleeve in said tube communicating at one end with saidhousing through said side and forming with said burner tube an annulargas passageway terminating at and delivering gas to said fuel deliveryend of said tube, an enlarged throat extending from said passageway atthe attached end of said tube into the bottom of the fan housing, a gasand air mixing tube in the bottom of the housing extending through anopposite side of the housing into said throat, valved control means forsupplying gas under pressure to said tube, an oil line extending throughsaid housing and sleeve to said delivery end of said tube, a burner tipon said oil line at the delivery end of said tube, a gas pilot in saidsleeve at the delivery end of said tube for igniting gas delivered tosaid delivery end of said tube, and electrodes in said sleeve forigniting both said burner tip and said pilot.

References Cited in the file of this patent UNITED STATES PATENTSSchutte Oct. Wales Oct. Williams Nov. Ferguson Mar Kunitz Nov 4 ScottIan. 12, 1932 Barley Oct. 24, 1933 De Florez Jan. 8, 1935 Brown NOV. 16,1937 Haedike Nov. 18, 1941 Zink Mar. 21, 1944 Turpin Jan. 30, 1945 JonesAug. 30, 1949 Young Nov. 25, 1952 Siemon Mar. 17, 1953

